Dynamical normal modes for time-dependent Hamiltonians in two dimensions

Abstract

We present the theory of time-dependent point transformations to find independent dynamical normal modes for 2D systems subjected to time-dependent control in the limit of small oscillations. The condition that determines if the independent modes can indeed be defined is identified, and a geometrical analogy is put forward. The results explain and unify recent work to design fast operations on trapped ions, needed to implement a scalable quantum-information architecture: transport, expansions, and the separation of two ions, two-ion phase gates, as well as the rotation of an anisotropic trap for an ion are treated and shown to be analogous to a mechanical system of two masses connected by springs with time dependent stiffness.

9 pages, 4 figures

References in corpus (4)

• Coherent control of trapped ions using off-resonant lasers
• Modes of Oscillation in Radiofrequency Paul Traps
• Fast phase gates with trapped ions
• Classical and Quantum Modes of Coupled Mathieu Equations

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